Power plants – Combustion products used as motive fluid
Patent
1996-08-28
1997-09-09
Casaregola, Louis J.
Power plants
Combustion products used as motive fluid
60 3912, F02C 328
Patent
active
056644116
ABSTRACT:
A method for generating electric power comprises the S cycle, an air separation unit and a Rankine cycle. Steam, oxygen and coal are introduced into a reaction chamber to form fuel gas. The fuel gas flows through heat exchangers and a compressor-turbine group to three combustors. Three combustors are operated at different pressure levels. The combustion gases of the first combustor go to the first gas turbine. The exhaust of the first gas turbine is employed as working medium for the succeeding combustors and gas turbines. The combustion gases of the second combustor flow to the second gas turbine, and the combustion gases of the third combustor go to the third gas turbine. The exhaust of the third gas turbine is utilized to heat compressed air and to produce steam for coal gasification and Rankine cycle. An integrated air separation unit, including a pressure temperature swing process, produces pure oxygen on site and generates electricity through a turbine compressor group.
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